RHS DANB EXAM QUESTIONS WITH 100% SOLVED ANSWERS A+ PASS

RHS DANB EXAM QUESTIONS WITH 100% SOLVED ANSWERS A+ PASS Where is the most appropriate place to store dental? - Answer- In a cool, dry closet Describe patient preparation for intraoral radiography - Answer- inspect the patients head and neck for any removable metal objects (jewelry, removable dentures, hearing aids etc.) Preparation for panoramic radiography - Answer- Remove any glasses or removable prostheses, hearing aids, jewelry, etc. *No thyroid collar and back is exposed What should X-ray generally include? (5 tissue types) - Answer- Outermost - innermost: Enamel Dentin Pulp Canal Nerve / Blood vessel Bone What is the bisecting technique? - Answer- The proper direction of the central ray is 90 degrees to the imaginary bisector what is the paralleling technique?; why is it preferred? - Answer- - Film aligned to the long axis of the teeth less distortion The use of outdated/expired dental film may cause the x-ray to have: - Answer- Foggy and can have a slightly greyish apperance How is vertical angulation calculated in degrees? - Answer- + if it angles downward - if it angles upward When do you take BW on children? - Answer- If there is no decay, BW are done every 1- 1.5 years until permanent teeth come in, after that.. 2 years What is the best exposure technique on children? and why? - Answer- Panoramic if available, less radiation If a panoramic image is not available,what is the process on children exposure? - Answer- 0-5 - occlusal, posterior BW and PA 6-9 smaller FMX 10-12 full FMX What is edentulous? - Answer- partial or complete areas in the mouth with no teeth How to properly expose edentulous patient? - Answer- pano or 10-14 PA When to use Tomography? - Answer- Assess or obtain a three-dimensional view of various sites. Possible implant or when need to know the amount of bone present Disadvantages of CT? - Answer- Higher doses of radiation. -More expensive than plain radiograph -Still limited visualization of soft tissue What to do when it's difficult to take posterior images? - Answer- take a panoramic image What is trismus? - Answer- Inability to open the jaw due to pain or infection How to select the right receptor size? Children, Ant., Adults - Answer- Children 0 Ant 1 Adults 2 -3 What's different about dual film packages? - Answer- 1 for dentist, 1 for specialist, increased radiation and slightly more expensive What is cone beam tomography or CBCT? Primary use? - Answer- Cone beam tomography is a cone shaped x-ray beam that moves around the patients head and face 360 degrees rotation for 10-40 seconds. Orthodontia When are Snap-a-rays typically used? When do you not use Snap-a-rays? - Answer- On pediatric patients, gag reflexes and situations where distortion is not a great issue. Pre molars, molars and 3rds Evaluations of toothless individuals or endodontic disease How do you classify intraoral films? What does the x mean? - Answer- PA - 1.x BW - 2.x O - 3.x For intraoral x-rays, what film speed is the fastest and reduces the amount of patient exposure to radiation? - Answer- F - fastest (Incorporation of tabular shaped (vs round) grains into the emulsion, thus increasing effective surface areas. The type of radiograph that would show the whole tooth including the crown, roots and jawline is called: Size: - Answer- Periapical X-ray Size- Comes in 0, 1 and 2 What should be included in an O? Size film? - Answer- Designed for use in a larger areas like the floor of the mouth Size- 0, 1, 2, 3, 4 - if available. What is a bitewing radiograph is useful in diagnosing? - Answer- Tooth decay, periodontal bone loss and gum disease. Cannot diagnose impacted teeth. Difference in paralleling vs bisecting? - Answer- Paralleling refers to placement of the long axis of the object in parallel to the film Bisecting refers to positioning the radiation beam perpendicular to the midpoint of the angle between the film and the long axes of the teeth Which technique is more preferred? Why? - Answer- Paralleling - less distortion and more accuracy Describe good positioning of the BID? - Answer- 1. Angled vertically with its flat open end parallel to the film container in order to avoid distortion 2. Positioning tube should angled horizontally to the plane of the area to be covered, aiming the x-rays perpendicular to the film 3. Center of the cone of x-rays must be localized over the middle of the film in order to avoid partial images or an incomplete pattern (cone cutting)